Radiation module capable of resisting backward hot fluid flow

ABSTRACT

A radiation module capable of resisting backward hot fluid flow comprises a fan, a radiator and a retaining tool. The fan provides an inlet and an outlet. The radiator is connected to the outlet of the fan. The retaining tool secures the radiator to a heat generation part. At least a baffle is provided in the radiation module. The fluid enters the fan via the inlet and flows toward the radiator at the outlet to assist cooling the heat generation part indirectly and the fluid, which passes through the radiator with temperature rise, can be resisted to move backward with the baffle so as to enhance heat dissipation efficiency.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to a radiation module capable of resisting backward hot fluid and particularly to a radiation module applied to cooling a heat generation part.

2. Brief Description of the Related Art

Referring to FIGS. 1 to 3, the conventional radiation module includes a fan 14, a radiator 15 and a retaining tool 16. The heat generation part 12 is disposed in a base seat 13 of a main board 11 and the base seat 13 is provided with several lock pieces 131, which extend outward from the base seat 13. The radiator 15 is attached to the surface of the heat generation part 12 with a plurality of cooling fins 151 in the radiator 15 being arranged in a way of forming a flow passage 152 between the cooling fins 151 respectively for being passed through by the fluid. The retaining tool 16 fits with the radiator 15 and has a cover frame 161 with holding parts 162, 163 and a plurality of through holes 164. The holding parts 162, 163 have hook holes 1621, 1631 to engage with the lock pieces 131 such that the cover frame 161 can press the radiator 15 to closely contact with the surface of heat generation part 12. The fan 14 provides a frame 141 and a fan wheel 142. The frame 141 has a plurality of through holes 1411 provides an inlet 1412 and an outlet 1413 at two sides thereof respectively with the outlet 1413 being joined to the radiator 15. At least a fastener 17 passes through the through holes 1411 of the frame 141 and the through holes 164 of the cover frame 161 such that the fan 14 can be secured to the radiator 15 and the retaining tool 16.

The fan 14 rotates to drag the fluid entering the fan 14 via the inlet 1412 and blowing toward the radiator 15 at the outlet 1413 and then flows outward via the flow passage 152 of the radiator 15. The outgoing fluid becomes hotter due to heat transfer but the outgoing fluid around the radiator 15 very easy to flow backward to the fan 14 via the inlet 1412 again to constitute a cycle while the fan 14 is in a state of running. As a result, lower heat convection efficiency is obtained to reduce heat dissipation efficiency tremendously.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a radiation module capable of resisting backward hot fluid flow in which at least a baffle can block the returning hot fluid entering the fan via the inlet thereof again so as to enhance the heat dissipation efficiency.

Another object of the present invention is to provide a radiation module capable of resisting backward hot fluid flow with which the life span of the heat generation part can be extended in spite of no sophisticate structure.

A further object of the present invention is to provide a radiation module capable of resisting backward hot fluid flow in which the baffle thereof is made of sound absorptive material to lower noise decibel.

Accordingly, the radiation module capable of resisting backward hot fluid flow according to the present invention comprises a fan, a radiator and a retaining tool. The fan provides an inlet and an outlet. The radiator is connected to the outlet of the fan. The retaining tool secures the radiator to a heat generation part. At least a baffle is provided in the radiation module. The fluid enters the fan via the inlet and flows toward the radiator at the outlet to assist cooling the heat generation part indirectly and the fluid, which passes through the radiator with temperature rise, can be resisted to move backward with the baffle so as to enhance heat dissipation efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:

FIG. 1 is an exploded perspective view of the conventional radiation module;

FIG. 2 is an assembled perspective view of the conventional radiation module;

FIG. 3 is a sectional view of the conventional radiation module illustrating operation thereof;

FIG. 4 is an exploded perspective view of the first embodiment of a radiation module capable of resisting back hot air flow according to the present invention;

FIG. 5 is an assembled perspective view of the first embodiment according to the present invention;

FIG. 6 is a sectional view of the first embodiment according to the present invention illustrating operation thereof;

FIG. 7 is an exploded perspective view of the second embodiment of an radiation module capable of resisting back hot air flow according to the present invention;

FIG. 8 is an assembled perspective view of the second embodiment according to the present invention;

FIG. 9 is a sectional view of the second embodiment according to the present invention illustrating operation thereof;

FIG. 10 is an exploded perspective view of the third embodiment of a radiation module capable of resisting back hot air flow according to the present invention;

FIG. 11 is an assembled perspective view of the third embodiment according to the present invention;

FIG. 12 is a sectional view of the third embodiment according to the present invention illustrating operation thereof.

FIG. 13 is an assembled perspective view of the fourth embodiment of a radiation module capable of resisting back hot air flow according to the present invention;

FIG. 14 is an exploded perspective view of the fifth embodiment of a radiation module capable of resisting back hot air flow according to the present invention;

FIG. 15 is an assembled perspective view of the fifth embodiment of a radiation module capable of resisting back hot air flow according to the present invention;

FIG. 16 is a plan view illustrating another type of the baffle in the preceding embodiments;

FIG. 17 is a plan view illustrating a further type of the baffle in the preceding embodiments;

FIG. 18 is a plan view illustrating a further type of the baffle in the preceding embodiments;

FIG. 19 is a plan view illustrating a further type of the baffle in the preceding embodiments;

FIG. 20 is a plan view illustrating a further type of the baffle in the preceding embodiments; and

FIG. 21 is a plan view illustrating a further type of the baffle in the preceding embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 4 and 5, the first embodiment of a radiation module capable of resisting back hot air flow according to the present invention includes a radiation module and a heat generation part 24. The radiation module comprises a fan 21, a radiator 23 and a retaining tool 22. The fan 21 further comprises a fan frame 211 and a fan wheel 212. The fan frame 211 provides an inlet 2111 and an outlet 2112. The fan frame 211 has through holes 213 at four corners thereof for being passed through with fasteners 27 and has a baffle part 214 extending outward. The radiator 23 has a plurality of cooling fins 231 with a flow passage 232 between adjacent cooling fins 231 for fluid flowing through. The retaining tool 22 has a central opening 221 with the four corners thereof having through holes 222 for the fan 21 being secured. The two lateral sides of the retaining tool 22 provide holding parts 223, 224 with hook holes 2231, 2241 respectively and the holding part 2241 is movably attached to the retaining tool 22. The heat generation part 24 is disposed in a base seat 26 of a main board 25 and base seat 26 is a frame for receiving the radiator 23 with locking pieces 261 jutting out the base seat 26.

The heat generation part 24 is placed in the base seat 26 of the main board 25 and the radiator 23 of the radiation module is closely attached to the surface of the heat generation part 24. Then, the holding parts 223, 224 at two lateral sides of retaining tool 22 are arranged to be perpendicular to both lateral sides of the base seat 26 and the hook holes 2231, 2241 of the holding parts 223, 224 engage with the lock pieces 261 of the base seat 26 such that the retaining tool 22 can secure the radiator 23 to the heat generation part 24 to allow the outlet 2112 of the fan 21 is on the retaining tool 22. Then, the fasteners 27 pass through the through holes 213 of the fan frame 211 and through holes 222 of the retaining tool 22 to allow the fan 21 being joined to the radiator 23 and the retaining tool 22. Further, the baffle part 214 can be disposed next to the exit of the respective flow passage 232.

Referring to FIG. 6, when the fan 21 rotates, the fluid is dragged to enter the fan 21 via the inlet 2111 and flows outward toward the radiator 23 at the outlet 2112 and the fluid is affected by the radiator 23, which transmits the heat of the heat generation part 24, to increase temperature thereof and flow out via two lateral sides of the exit of the flow passage 232. Besides, the baffle 214 neat the exit of the flow passage 232 can block the fluid with higher temperature flowing back to the inlet 2111 of the fan 21 so as to avoid lower convection efficiency. Hence, the disadvantage of the conventional structure can be overcome so that heat dissipation efficiency of the radiation module can be enhanced and the life span of the heat generation part 24 can be prolonged.

The baffle 214 can be made integrally with the fan 21 or can be a separate unit from the fan 21.

Referring to FIGS. 7 to 9, the second embodiment of the present invention is illustrated. The entire structure and function of radiation module in the second embodiment is almost the same as first embodiment and it is noted the identical parts and reference numbers will not be described in detail. The difference of the second embodiment is in that the baffle 314 is joined to the retaining tool 22 and the baffle 214 can be made integrally with the fan 21 or can be a separate unit from the fan 21.

Referring to FIGS. 10 to 12, the third embodiment of the present invention is illustrated. The entire structure and function of radiation module in the third embodiment is almost the same as the preceding embodiments and it is noted the identical parts and reference numbers will not be described in detail. The difference of the third embodiment is in that the baffle 414 is joined to the radiator 23 and the baffle 414 can be made integrally with the radiator 23 or can be a separate unit from the radiator 23.

Referring to FIG. 13, the fourth embodiment of the present invention is illustrated. The entire structure and function of radiation module in the fourth embodiment is almost the same as the preceding embodiments and it is noted the identical parts and reference numbers will not be described in detail. The difference of the fourth embodiment is in that the baffle 514 provides a side wall 5141 at the two lateral sides thereof respectively and the side wall 5141 is parallel to and adjacent with the cooling fins 231 of the radiator 23 and the baffle 414 with the side wall 5141 can be made integrally with the radiator 23 or can be a separate unit from the radiator 23.

Referring to FIGS. 14 and 15, the fifth embodiment of the present invention is illustrated. The entire structure and function of radiation module in the third embodiment is almost the same as the preceding embodiments and it is noted the identical parts and reference numbers will not be described in detail. The difference of the fifth embodiment is in that the radiator 63 is cylindrical with the cooling fins 631 extending outward radially with the flow passages 632 between the cooling fins 631 constituting a radial shape. The retaining tool 62 is annular to correspond to the radiator 63 and the base seat 66 of the main board 25 is annular too to correspond to the radiator 63. The baffle 614 provides a circular shape to surround the fan frame 211 and is disposed at the exits of the flow passages 632 to resist the outgoing hotter fluid from the flow passages 632 flowing backward.

Referring to FIGS. 16 to 21, the baffle 214, 314, 414, 514, 614 in the preceding embodiment can be any shape such as semicircular shown in FIG. 16, semi-ellipse shown in FIG. 17, trapezoidal shape as shown in FIG. 18, five sided polygon as shown in FIG. 19, six sided polygon as shown in FIG. 20, irregular shape as shown in FIG. 21. Besides, the baffle 214, 314, 414, 514, 614 can be made of sound absorptive material to absorb noise resulting from running fan 21 and fluid flowing so as to reduce the sound decibel of the entire radiation module.

While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims. 

1. A radiation module capable of resisting backward hot fluid flow, comprising: a fan, providing an inlet and an outlet; a radiator, being connected to the outlet; and a retaining tool, securing the radiator to a heat generation part; characterized in that at least a baffle is provided in the radiation module; whereby, fluid enters the fan via the inlet and flows toward the radiator at the outlet to assist cooling the heat generation part indirectly and the fluid, which passes through the radiator with temperature rise, can be resisted to move backward with the baffle so as to enhance heat dissipation efficiency.
 2. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle is attached to the fan.
 3. The radiation module capable of resisting backward hot fluid flow as defined in claim 2, wherein the baffle is formed integrally with the fan.
 4. The radiation module capable of resisting backward hot fluid flow as defined in claim 2, wherein the baffle is made as separate unit from the fan.
 5. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle is attached to the radiator.
 6. The radiation module capable of resisting backward hot fluid flow as defined in claim 5, wherein the baffle is made integrally with the radiator.
 7. The radiation module capable of resisting backward hot fluid flow as defined in claim 5, wherein the baffle is made as a separate unit from the radiator.
 8. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle is attached to the retaining tool.
 9. The radiation module capable of resisting backward hot fluid flow as defined in claim 8, wherein the baffle is made integrally with the retaining tool.
 10. The radiation module capable of resisting backward hot fluid flow as defined in claim 8, wherein the baffle is made as a separate unit from the retaining tool.
 11. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle can be any shape.
 12. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle is made of sound absorptive material.
 13. The radiation module capable of resisting backward hot fluid flow as defined in claim 1, wherein the baffle is provided with a lateral wall at both ends thereof. 